> Requiring a disclaimer is essentially admitting the content isn’t meaningfully different than human generated content. At that point, who cares? Just engage with the premise on its own merits, rather than on how it was written.

The problem is the reader has to invest time to find out and LLM written text will (on average) lower the quality towards "meh" and spend more words doing so. Even if the author is making an earnest effort to produce high quality content, they need to admit to themselves and others that their results will be more hit or miss. The disclosure allows the reader to make a more informed decision about how to engage with the material (e.g., have an LLM summarize or analyze the content, or just dive in because we know it will very likely be a good read). Editing what someone has written is like reviewing code, you're by default not as invested, so the results will likely reflect that reality.